Improvement in sewing-machines



UNITED f STATES Pnfrrnvr OFFICE.

- WILLIAM G. WINTERS, OF ROCHESTER, NEW YORK.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent N0. 112,308, dated February28, 1871.

i roe and State of New York, have invented a certainnew andusefulImprovement in Sewing-Machines, of which the following is aspecification Nature ofthe Invention.

This invention is an improvement upon the machine patented. toA.B.'Wilson, August 12, 1851, and known as the Wheeler Sr Wilsonmachine,77 and also upon the machine patented by Geo. B. Sloat,September 7,1858, known as the Improved Elliptic machine,7 and isapplicable` to rotary hook and bobbin machines only.

The novelty consists in the peculiar form and construction of thecloth-plate and feed-y bar, as hereafter described, whereby the threadis drawn up perfectly at each stitch in turning curves or corners as.well as in` straight work, and the clothV is held firmly., down beforeand beyond the needle during the operation of sewing, to prevent itsbeing drawn down in the needle-eye in the cloth-plate, or holding andpulling the work as it comes fromr ythe machine while being stitched, toprevent it from puckering and breaking the thread.

General Description.

In the' drawing, Figure lis a sectional elevation, showing` thecloth-plate, feedbar, and cloth-presser, with the usual underlyingparts. Figs. 2, 3, 4, 5, 6, and 7 represent my improved forms ofpresser, (shown inverted,) cloth-plate, and feed-bar; Figs. 8, 9,10, 11,and 12, views of the old forms of cloth-plate, feed-bar, and presser;Fig. 13, a diagram` illustrating the action of drawing the stitch.

The operating parts of `the machine are of the usual form, with theexception of the clothplate A, feed-bar B, and presser G.

The cloth-plate A, instead of having lthe ordinary eye a for the passageof the needle,

, which is elongated, as shown in Figs. 9 and 11,'is provided withauneedle-eye, al, having two right-angled slots, a2 a2, Figs. 3 and 5,opening from it, for the purpose of allowing the thread free andunobstructed action dur ing the formation and drawing of the stitches,

in whatever direction the cloth may be turned or fed.

It' desired, the slot al may open into slot b2, as in Fig. 7. Also,instead of having simply two narrow elongated slots, b b, Figs. 9 and11, it is provided with three slots or openings, bl b1 b2, Figs. 3 and5, the latter being situated forward and widened beyond the needle-eyeal, in order to receive the increased bearingsurface of the feed-barresting therein, presently to be. described.

The feed-barB is of the same shape, and is operated in the same manner,as the old form of bar, (shown in Fig. 10,) with the exception that thefeed-point d, instead of having simply the ordinary bearing-surfaces ee, Fig. 10, which come just under and in the rear of the needle, has twobearing-surfaces, cl c?, the latter extending forward and beyond theneedle an extra distance, and being widened, as shown at f, which entersthe slot b2 before referred to. It also has a thread-bar, g, on oneside, opposite the needle-thread, for the purpose of preventing thethread from being drawn over the corner of the feed-point e, and therebycausing an uneven tension and breaking of the upper thread while thestitch is being taken or drawn up.

This construction leaves a large open passage for the working of thethread, which is necessary in my invention, and yet it serves as aperfect guard to prevent the catching of the thread, as beforedescribed. In this respect it differs essentially from a feed-bar havingsimply a long narrow slot to allow the needle to pass through withoutrespect to the drawing up of the thread.

The presser Gis operated in the usual manner, and is of the ordinaryform, Fig. 8, ex-V and in front and rear of the needle; that ltheclothis held before and beyond the needle

